POITIERS, FRANCE: American Tyler Hamilton rides nearby a field of sunflowers during the 19th stage of the 86th Tour de France...

U.S. cyclist Tyler Hamilton looks on during the presentation of the Tinkoff Credit Systems cycling team in Rome, Tuesday, Jan...

Cyclist Tyler Hamilton sits for a photo with his bike at his Boulder, Colo., home, Saturday, April 16, 2005...

Tyler Hamilton, center, is back in the peloton after a two-year ban

Tyler Hamilton, left, and David Millar both served two-year bans for respective doping charges

One recent investigation turned up a damning list of performance-enhancers allegedly ordered by Tyler Hamilton's wife

Competing against banned riders -- such as Tyler Hamilton -- might earn cyclists a one-month suspension

Tyler Hamilton is the only U.S. cyclist to win gold in Athens

Tyler Hamilton, center, scored another cycling win for the U.S

Tyler Hamilton won the first Tour stage of his career Wednesday

Tyler Hamilton competes in stage 12 of the Tour de France, an individual time trial. He was fifth...

Joey Kramer, Tom Hamilton, Joe Perry, Steven Tyler and Brad Whitford of Aerosmith (Photo by Kevin Mazur/WireImage for HK Management - Aerosmith